function openpo(){
    let open = document.querySelector('.open');
    let close = document.querySelector('.close');
    open.style.display = 'none'
    close.style.display = 'flex'

}
function closepo(){
    let open = document.querySelector('.open');
    let close = document.querySelector('.close');
    open.style.display = 'flex'
    close.style.display = 'none'

}